<template>
  <el-container class="home_container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/imgs/container_header.png" alt="" />
        <span>后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle_button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          default-active="2"
          class="el-menu-vertical-demo"
          background-color="#313743"
          text-color="#fff"
          active-text-color="#339af4"
          :unique-opened="true"
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="item in menuList"
            :key="item.id"
          >
            <!-- 一级菜单模板区 -->
            <template slot="title">
              <!-- 一级菜单图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{ item.authName }}</span>
            </template>

            <!-- el-menu-item二级菜单 -->
            <el-menu-item
              :index="'/' + subitem.path"
              v-for="subitem in item.children"
              :key="subitem.id"
              @click="saveNavState('/' + subitem.path)"
            >
              <!-- 二级菜单模板区 -->
              <template slot="title">
                <!-- 二级菜单图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{ subitem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  name: "Home",
  data() {
    return {
      //左侧菜单数据
      menuList: [],
      iconsObj: {
        125: "iconfont icon-users",
        103: "iconfont icon-tijikongjian",
        101: "iconfont icon-shangpin",
        102: "iconfont icon-danju",
        145: "iconfont icon-baobiao",
      },
      //是否折叠
      isCollapse: false,
      //被激活的链接的地址
      activePath: "",
    };
  },
  created() {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem("activePath");
  },
  methods: {
    logout() {
      window.sessionStorage.clear();
      this.$router.replace("/login");
    },
    //获取所有菜单
    async getMenuList() {
      let { data: res } = await this.$http.get("menus");
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg);
      } else {
        this.menuList = res.data;
      }
    },
    //点击按钮切换菜单的折叠与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse;
    },
    //保存连接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem("activePath", activePath);
      this.activePath = activePath;
    },
  },
};
</script>

<style scoped>
.home_container {
  height: 100%;
}
.el-header {
  display: flex;
  justify-content: space-between;
  background-color: #363d40;
  padding-left: 0;
  align-items: center;
}
.el-header div {
  display: flex;
  align-items: center;
}
.el-header div span {
  color: #fff;
  font-size: 20px;
  margin-left: 10px;
}
.el-header img {
  width: 139px;
  height: 57px;
}
.el-aside {
  background-color: #313743;
  transition: all 0.5s;
}
.el-aside .el-menu {
  border-right: none;
}
.el-main {
  background-color: #e9edf1;
}
.iconfont {
  margin-right: 5px;
}
.toggle_button {
  background-color: #465263;
  color: #fff;
  font-size: 10px;
  line-height: 24px;
  text-align: center;
  cursor: pointer;
}
</style>